Use this bracket to add strength to the motor mount of the Phantom 3 where cracks sometimes occur. You will need to print 4 of them. One for each bracket and use M3 - 10mm screws to replace the original screws. They are available at Lowes. Home Depot didn't have them. EDIT: Now with a second file which have 6 screw holes to hold the shell together. I can't tell you what screws you need for the shell but they are smaller and longer than the M3 -10MM screws. If anyone finds the correct screws please let me know and I will post.